It is very normal!! I think the first year I had my period, it was brown and mushy (tmi) on the pad. Congrats to you! In the next coming year it will get heavier and definitely brighter in color!
This is Normal the first day or two the Blood is usually brighter color after a couple of days it changes, you have no problem, when you first start periods it may not be too much but as your body gets "used 'to it, the bleeding is olonger. Also the Air changes the color of blood.Congrats on becoming a young Woman.